It would be nice to have another possible value for list-style-type,
namely 'collapsible'. This would mean that browsers implementing this
suggestion could display the list in a collapsible tree-view style.
This would eliminate the need for a lot of JavaScript, and would mean
that what is a relatively common GUI widget could be specified by
authors with minimal fuss. It would improve HTML coding, because such
lists could be marked up with the <ul> element for non-CSS3 browsers.
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Gg